19699039943 has 6 divisors (see below), whose sum is σ = 21652663872. Its totient is φ = 17908218020.

The previous prime is 19699039937. The next prime is 19699039951. The reversal of 19699039943 is 34993099691.

It is not a de Polignac number, because 19699039943 - 2⁸ = 19699039687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19699030943) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81400871 + ... + 81401112.

It is an arithmetic number, because the mean of its divisors is an integer number (3608777312).

Almost surely, 2^19699039943 is an apocalyptic number.

19699039943 is a deficient number, since it is larger than the sum of its proper divisors (1953623929).

19699039943 is a wasteful number, since it uses less digits than its factorization.

19699039943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162802005 (or 162801994 counting only the distinct ones).

The product of its (nonzero) digits is 12754584, while the sum is 62.

The spelling of 19699039943 in words is "nineteen billion, six hundred ninety-nine million, thirty-nine thousand, nine hundred forty-three".